20008009

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{1153}}^1$

素因数の和:1264

約数の個数: 16

約数和(自身を含む): 23855488

約数和(自身を除く): 3847479

約数列:

[1, 7, 37, 67, 259, 469, 1153, 2479, 8071, 17353, 42661, 77251, 298627, 540757, 2858287, 20008009]

約数ペア:

[(1, 20008009), (7, 2858287), (37, 540757), (67, 298627), (259, 77251), (469, 42661), (1153, 17353), (2479, 8071)]